The heat from a laptop, placed directly on the lap, can hurt a man's fertility. Sitting in a kind of lotus position, keeping your legs crossed, or otherwise keeping your laptop away from a closed lap is a notable improvement in keeping sperm at a safer temperature, according to State University of New York at Stony Brook researchers. Just as interesting were the findings that, in a study of 29 men, using "laptop shields" seemed to have negligible impact on the heat levels measured on men's genitalia. Just something to, you know, keep in mind. [Wired Science; image via Adam Tinworth.]